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Weird Java 6 Double-buffe

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I'm having a printing issue since upgrading my Swing app from 
JDK1.4.2_06 to JDK6.0 (b105).  I think its double buffer related.

As many of you may know, before printing, one must disable double 
buffering.  This reduces the amount of data sent to the printer as well 
as improving quality drastically because the double buffer at low res 
monitor resolution is printed to a high resolution device -- end result 
is pixelated blurry text and lines on paper!

Ever since I upgraded my app, my JTable components have been 
experiencing this exact problem.  I've set double buffering off 
*globally* using the call:

RepaintManager.currentManager(null).setDoubleBufferingEnabled(false);

I confirmed that double buffering is disabled both by setting 
breakpoints in my JTable cell renderer and noticing that my app flickers 
badly with any onscreen rendering.  Yet, my output to the printer for 
*just* JTable components is pixelated and blurry!

Here's one more damning piece of evidence.  If I print to a virtual 
device like my Adobe Acrobat PDF generator, the resulting output has 
blurry text and lines just the same.  Interestingly, while I'm 
*scrolling* the PDF document, I can see it draws a *razor* sharp 
vector-based text and lines for just a split second (I zoom in at 500% 
view to exaggerate the effect).  But then the razor sharp vector drawn 
image is almost instantly covered up with low-res raster copy which I 
presume is the on-screen double buffer coming in on top of what was 
drawn first.

What is going on here?  Has Java 6 changed double buffering in some way? 
  Or is something else at work here causing this problem?  The only 
thing I can think of is that double buffering is getting enabled 
somehow, without my knowledge, just for the duration of Swing's 
rendering for print output.  How can that happen?

Some technical details:

- I am printing a composite component with JLabel, JTable, JButtons
- Everything else is sharp and blurriness only happens on JTable 
rendering.  If the JTable doesn't break across the page, it is printed 
sharp!  Weird.
- I have a simple custom table cell renderer for each cell of the table. 
  I am overriding paintComponent(...) for custom rendering


Help!

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Weird Java 6 Double-buffe "SwingGuy" <swingguy@THRWHITE.remove-dii-this> - 2011-04-27 15:33 +0000

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